Introduction

Bis(hexamethylenetriaminepenta(methylenephosphonic acid)), commonly abbreviated as **BHMTPMPA** (CAS number: 34690-00-1), is a specialized chelating agent and scale inhibitor. Known for its exceptional calcium ion tolerance and water solubility, this compound plays a vital role in industrial water treatment and other applications requiring effective scale control.

Chemical Profile

Molecular Formula: C17H44N3O15P5
Molar Mass: 685.41 g/mol  
Density:1.24 g/mL at 20°C  
Boiling Point (Predicted):1002.7 ± 75.0°C  
Flash Point:560.2°C  
Water Solubility: Up to 550 g/L at 20°C  

Physical Description

Appearance: White to off-white solid or powder 

Storage Conditions

To ensure stability and effectiveness, BHMTPMPA should be stored in a cool, dry place, away from moisture and extreme temperatures.

Applications

      Scale Inhibition：

       BHMTPMPA effectively inhibits the formation of carbonate and sulfate scales, making it               indispensable in industrial water treatment systems, including cooling towers and boilers.

      Chelating Agent：

       This compound binds metal ions efficiently, preventing scale buildup in processes where             mineral-rich water is used.

      Thermal Stability：

       Its excellent thermal stability at temperatures up to 120°C and across a broad pH range               ensures reliable performance in challenging industrial environments.

      High Calcium Ion Tolerance：

       Unlike many scale inhibitors, BHMTPMPA maintains its effectiveness in hard water                         conditions, where calcium concentrations are significantly higher.

Conclusion

BHMTPMPA is a high-performance compound widely used in water treatment and industrial processes requiring scale prevention. Its robust thermal stability, broad pH tolerance, and superior calcium ion compatibility make it an ideal solution for demanding applications. Whether addressing hard water challenges or enhancing process efficiency, BHMTPMPA stands out as a reliable choice for scale control.